A GRIEVING mother suing the state's Child Safety Department for negligence has pleaded with Premier Campbell Newman to allow his child protection inquiry to review her case.

The woman, who cannot be named for legal reasons, is not permitted to have her case examined by Queensland's Child Protection Commission of Inquiry because all matters before courts are outside its terms of reference.

The Child Safety Department has revealed it is being sued by up to 15 families, which means some or all of their cases may also be left unexplored by an inquiry that was set up to fix the child safety system.

But the inquiry will spend time examining the Heiner Affair - an unrelated 20-year controversy involving shredded documents and "hush money" at the John Oxley Detention Centre.

The mother told The Courier-Mail that the Premier should change his terms of reference so the public could hear the truth about the system's failures.

A Child Safety internal review admitted the department did not tell the woman about the 15-year-old foster child's prior sexualised behaviour because it considered him a "low risk" of offending.

But even though Child Safety admitted its failures, another government entity, Crown Law, informed the woman that it would be seeking a contribution claim, meaning if a court awarded compensation to her son, she should be the one to cough up the cash.

The State Government's taxpayer-funded claim says the mother failed to properly supervise the foster child.

"I think all cases deserved to be heard, not just the ones they pick and choose," she said.

"I don't want this to happen to other families."

A spokesman for Tim Carmody, who is heading the inquiry, said: "While the commission cannot comment on this particular case as it is before the court, it provides a scenario that highlights an example of placement procedures, placement options and information exchange, which are areas the commission is currently exploring to make recommendations for reform".

Earlier, when asked about The Courier-Mail's revelations about the woman's case, Mr Newman (pictured) said he was constrained in what he could say because the matter was before the courts.

"These alleged matters occurred before the Government even got into office and that's all I'll say," he said.

He said he had confidence in Child Safety Minister Tracy Davis. "There is a child safety review that we launched ages ago.

"That is occurring as we speak," Mr Newman said.

"That inquiry is running at the moment (and) ... I am sure that it can look at issues like this one."

Ms Davis failed to answer why her department was using taxpayers' money to lay blame on the mother.